Belt buckle



FIG. 1 is a perspective view of a belt buckle showing my new design;

FIG. 2 is a top plan view, the opposite side being a mirror image;

FIG. 3 is a right end elevational view;

FIG. 4 is a left end elevational view; and,

FIG. 5 is a bottom plan view. 

The ornamental design for a belt buckle, as shown and described. 